/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.validator.defaultValidators;

import ch.trackedbean.validator.engine.*;

/**
 * Validator for {@link Range}.
 * 
 * @author M. Hautle
 */
public class RangeValidator extends AbstractValidator {
	/** The minimum value of the range */
	private double min;

	/** The maximum value of the range */
	private double max;

	/** If null is allowed. */
	private boolean allowNull;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void init(Configuration cfg) {
		min = cfg.getDouble(Range.ATTR_MIN, 0);
		max = cfg.getDouble(Range.ATTR_MAX, Double.MAX_VALUE);
		allowNull = cfg.getBoolean(Range.ATTR_ALLOW_NULL, false);
		final String messageKey = cfg.getString(Range.ATTR_MESSAGE, Range.DEFAULT_MESSAGE);
		error = new ErrorDescription(messageKey, new Double(min), new Double(max));
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected boolean isValid(Object value) {
		if (value == null && allowNull)
			return true;
		if (!(value instanceof Number))
			return false;
		final double number = ((Number) value).doubleValue();
		if (number >= min && number <= max)
			return true;
		return false;
	}
}
